Cisco / Cisco ISR4000
ISR4221-B-K9
Cisco ISR 4221 High BW (2GE, 2NIM, 4G FLASH, 4G DRAM, IPB)
- EOL
- 2019-04-30
- EOS
- 2019-10-29
- EOSL
- 2024-10-31
Series lifecycle table
Cisco ISR4000 EOL List
This table tracks end-of-life milestones for 6 Cisco ISR4000 part numbers. For each record it lists the key dates published in Cisco lifecycle notices: the EOL announcement date, End-of-Sale (EOS), and End-of-Service-Life (EOSL). The Cisco ISR4000 family has no single end-of-life date; milestones are set per part number, so use the table to find the exact SKU you operate. Across this series, EOSL dates range from 2024-10-31 to 2025-10-31. Open any part number for source details, replacement fields, and current availability options.
6 products
Cisco ISR4000 Series
Total Products: 6 | Page 1 of 1
Cisco / Cisco ISR4000
ISR4321-B-K9
Cisco ISR 4321 (2GE, 2NIM, 4G FLASH, 4G DRAM, IPB)
- EOL
- 2019-04-30
- EOS
- 2019-10-29
- EOSL
- 2024-10-31
Cisco / Cisco ISR4000
ISR4331-B-K9
Cisco ISR 4331 (3GE, 2NIM, 1SM, 4G FLASH, 4G DRAM, IPB)
- EOL
- 2019-04-30
- EOS
- 2019-10-29
- EOSL
- 2024-10-31
Cisco / Cisco ISR4000
SISR4451XNPEK9-38S
Cisco ISR 4451-X IOS XE UNIVERSAL - NO PAYLOAD ENCRYPTION
- EOL
- 2020-04-30
- EOS
- 2020-10-29
- EOSL
- 2025-10-31
Cisco / Cisco ISR4000
SISR4451XUK9-38S
Cisco ISR 4451-X IOS XE UNIVERSAL
- EOL
- 2020-04-30
- EOS
- 2020-10-29
- EOSL
- 2025-10-31
Cisco / Cisco ISR4000
SISR4451XUK9-39S
Cisco ISR 4451-X IOS XE UNIVERSAL
- EOL
- 2020-04-30
- EOS
- 2020-10-29
- EOSL
- 2025-10-31
| Manufacturer | Part Number | Product Name | EOL Announcement | End of Sale (EOS) | End of Service Life (EOSL) |
|---|---|---|---|---|---|
| Cisco | ISR4221-B-K9 | Cisco ISR 4221 High BW (2GE, 2NIM, 4G FLASH, 4G DRAM, IPB) | 2019-04-30 | 2019-10-29 | 2024-10-31 |
| Cisco | ISR4321-B-K9 | Cisco ISR 4321 (2GE, 2NIM, 4G FLASH, 4G DRAM, IPB) | 2019-04-30 | 2019-10-29 | 2024-10-31 |
| Cisco | ISR4331-B-K9 | Cisco ISR 4331 (3GE, 2NIM, 1SM, 4G FLASH, 4G DRAM, IPB) | 2019-04-30 | 2019-10-29 | 2024-10-31 |
| Cisco | SISR4451XNPEK9-38S | Cisco ISR 4451-X IOS XE UNIVERSAL - NO PAYLOAD ENCRYPTION | 2020-04-30 | 2020-10-29 | 2025-10-31 |
| Cisco | SISR4451XUK9-38S | Cisco ISR 4451-X IOS XE UNIVERSAL | 2020-04-30 | 2020-10-29 | 2025-10-31 |
| Cisco | SISR4451XUK9-39S | Cisco ISR 4451-X IOS XE UNIVERSAL | 2020-04-30 | 2020-10-29 | 2025-10-31 |